Time Reversal

Time reversal may refer to:

  • In physics, T-symmetry - the study of thermodynamics and the symmetry of certain physical laws where the concept of time is reversed — i.e. where a mirror (reverse) transformation is applied to a forward direction time state.
  • Time Reversal Signal Processing, a signal processing technique popular in acoustics, and currently being applied to electromagnetics, that results from the reversal in time of a system's response signal
  • Time travel, theorised and speculative concepts about travelling physically through time

Famous quotes containing the words time and/or reversal:

    “But I am here,
    And they are far, and time is old.
    Within my dream the grass is cold;
    The legs and locked; the sky is dead.”
    —Mark Van Doren (1894–1973)

    “Perversity depends on reversal and substitution.”
    —Mason Cooley (b. 1927)